Improvement in electro-magnetic stop-motions for drawing or roving machinery



E. 30mm: 2. G. H. PILLSBURY. ELECTRO-MAGNETIC STOP-MOTION FUR. DRAWING0R ROVING MACHINERY. '3 Patented Feb. 22, ms.

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ILFEIERS, PHOTO-UTHOGRAPHER. WASH NGTON D C UNITED STATES I PATENTOFFiCE.

ERASTUS BOYDEN AND GEORGE H. PILLSBURY, OF LOWELL, MASS.

lMPROVEMENT IN ELECTRO-MAGNETIC STOP-MDTIONS FOR DRAWING 0R ROVINGMACHINERY,

Specification forming part of Letters Patent No. [73,888, dated February22, 1876; application filed January 12, 1876.

To all whom it may concern Be it known that we, ERASTUS BOYDENHINIYGEORGE H. PILLSBURY, of Lowell, of the county of Middlesex andState of Mass 1- chusetts, have invented an Electro-Magnetic Stop-Motionfor Machinery for the. Manufacture of Drawing or Roving; and do herebydeclare the same to be fully described in the following specificationand represented in the accompanying drawings, of which- Figure 1 denotesa front elevation, Fig. 2 an end View, Fig. 3 a top view, and Fig. 4 alongitudinal and horizontal section, of our stop-motion.

in carrying out our invention, as shown in the drawings, we make use ofan electro-magnet, its armature, and circuit-Wires, which we combinewith the roving or drawing guide, and with a latching apparatus of ashipper; the

whole being so that whenever the roving or drawing, may become broken orrun out, the guide shall rise and close the circuit, and

thereby cause the magnet to attract and move to close the circuit duringthe advance of the shipper.' When the guide is depressed and the shipperadvanced, the circuit becomes open or broken, and the armature fallsaway from the magnet, to aid in efi'ecting the latching of the shipper.

In the drawings, the shipper is shown at A as arranged to sliderectilinearly through guides to a, extending from a support-piece, '1,such shipper being provided with a spring, B, for retracting it orforcing it backward, to cause it, when in use, to move the drivingbeltfrom the fast to the loose pulley of the roving or drawing frame ormachine. There is also applied to the said shipper a springlatch, vO,formed as shown, to catch upon the shorter arm of a bent lever, 1),arranged as represented. Over the end of the longer arm of the bentlever is a stud, b, which projects rearward from a gravitating lever ortrigger, E, shaped as shown, the shorter arm a ct .which is heavier thanthe longer arm (1 of it. This trigger is pivoted in a bracket, 0, .itslonger arm being extended a short distance underneath the end of apendulous armature, F, of an electro magnet, G. The armature standsnearly vertical, and turns on a pin, f, projecting from a plate, g.Furthermore, there extends from the upper part of the armature, and overthe electro-magnet, a weight or arm, h, \vhich serves tothrowthearmature Otf the magnet whenever the circuit is broken,

being determined by a stop, 1', underneath the arm IL. The roving ordrawing guide is shown at H, in the form of a furcated bent lever,having its fulcrum at It. The unfurcated arm of the lever is theheavier, and has a small wire, 1, extended from it, to operate with ananvil, m, connected with one extremity of the electromagneticcircuit-wire n, the other circuit-wire, 0, being extended from astationary metallic standard, P, connected with the guide by a metalliclink, g. If, now, we suppose the sliver or roving to be in the fork ofthe guide, and intact, and the fork, by the drait on the roving orsliver, to be depressed so as to raise the wire loft the anvil m, thecircuit will be broken or open, it being understood that thecircuit-wires are to be connected with or applied to a galvanic battery.On advancing the shipper far enough, its latch 0 will catch upon thelower arm of the bent lever,

the retractive force of the spring of the shipper causing the bent leverto be turned on its fulcrum up against the, escapement or stud b of thetrigger E, whereby the longer arm of the said trigger will be moved upagainst the lower end of the armature. Under this condition :of theparts the shipper will be estopped in position, and will remain so whilethe sliver or roving may hold down the guide; but should the sliver orroving become broken or run out, so as to allowthe guide to rise, itsheavier arm will descend until the wire l-may reach the anvil m whichhaving taken place, the circuit will be closed,

and the armature will bedrawn toward the magnet and oi'fthetrigger.This'latter, rising up, will carry the escapement-stud off the bentlever, and allow it to be thrown up clear of the spring latch of theshipper, in which case the spring of the shipper Will force such shipperbackward, andby it effect the stoppage of the machine. Over the shipper,and below the electro-magnet, there is a circuit breaker and closer, S,to be actuated by the shipper.

It consists, mainly, of ametallic spring, w,

respectively attached to the two buttons, the

same being asshown in the drawings. The said circuit breaker and closerfurther consists of a stud, umhich extends up from the shipper, and,while the shipper is being advanced, is carried against the spring 10,so as to move it inward, and its button 8 against the button it, andclose the circuit. On the shipper being i'orcedback by its spring, thespring to will be set free, and will. move the button 8 away fromthe'button t, and thus .the circuit will be open or broken. Thus, whilethe machine is stopped, the batterywill cease'its action.,

We contemplate the application of our electromagnetic stop-motion tovarious kinds of machinery used for making drawing, roving, or yarn, orin the manufacturing of textile fabrics, the guide, in its construction,being varied, as circumstances may require.

, We are aware that an electromagnetic stopmotionfor machinery forspinning is not new, such being described in the United States PatentNo. 138,993, dated May 20,1873. Our stopmotion, though, like that,containing a mechanism by which, when a thread may brealqtliecircuitwill be closed, and the magnet be caused to operate its armature, tocause'it to set free the shipper to enable its spring to actuate it,differs materially therefrom in its construction, arrangement, andoperation of its parts, especially in the latching mechanism, and in thearrangement, construction, and mode ofoperation of the circuit breakerand closer S, which is entirely disconnected from the yarnguide lever H,and in no respect aids in moving such relatively to the yarn, as doesthe device or yoke described and shown in the said patent. Our latchingmechanism, as described, produces so little pressure on the armaturethat a very small amount of electric force is required to operate sucharmature.

We claim as our invention as follows:

;;l. The electromagnetic stop-motion, substantially as described,composed of the electro-magnet G, its circuit a o, armature F, drawingor roving guide H, shipper A, operative spring B, latch O, and levers DE, all arranged and applied as set forth.

t 2. Weclaim the combination of a circuit breaker and closer, S, (soseparated from the yarn-guide lever H as, while in movement, to beincapable of moving it either way on its fulcrum,) with theelectro-magnet G, its circuit n o, armature F, the drawing or'rovingguide H, the shipper A, its operative spring B, and latch or latchingmechanismO D E b all applied and to operate substantially as specifieERASTUS BOYDEN. GEORGE H. PILLSBURY. Witnesses:

HENRY R. men, A. J. SHEPARD.

